fkie_cve-2019-18684
Vulnerability from fkie_nvd
Published
2019-11-04 16:15
Modified
2024-11-21 04:33
Severity ?
Summary
Sudo through 1.8.29 allows local users to escalate to root if they have write access to file descriptor 3 of the sudo process. This occurs because of a race condition between determining a uid, and the setresuid and openat system calls. The attacker can write "ALL ALL=(ALL) NOPASSWD:ALL" to /proc/#####/fd/3 at a time when Sudo is prompting for a password. NOTE: This has been disputed due to the way Linux /proc works. It has been argued that writing to /proc/#####/fd/3 would only be viable if you had permission to write to /etc/sudoers. Even with write permission to /proc/#####/fd/3, it would not help you write to /etc/sudoers
References
| ▶ | URL | Tags | |
|---|---|---|---|
| cve@mitre.org | https://gist.github.com/oxagast/51171aa161074188a11d96cbef884bbd | Exploit, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://gist.github.com/oxagast/51171aa161074188a11d96cbef884bbd | Exploit, Third Party Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| sudo_project | sudo | * |
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*",
"matchCriteriaId": "B9079F2B-965B-4A0A-8FC0-105AC3C5DD62",
"versionEndIncluding": "1.8.29",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [
{
"sourceIdentifier": "cve@mitre.org",
"tags": [
"disputed"
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Sudo through 1.8.29 allows local users to escalate to root if they have write access to file descriptor 3 of the sudo process. This occurs because of a race condition between determining a uid, and the setresuid and openat system calls. The attacker can write \"ALL ALL=(ALL) NOPASSWD:ALL\" to /proc/#####/fd/3 at a time when Sudo is prompting for a password. NOTE: This has been disputed due to the way Linux /proc works. It has been argued that writing to /proc/#####/fd/3 would only be viable if you had permission to write to /etc/sudoers. Even with write permission to /proc/#####/fd/3, it would not help you write to /etc/sudoers"
},
{
"lang": "es",
"value": "** EN DISPUTA ** Sudo versiones hasta 1.8.29, permite a los usuarios locales escalar a root si poseen acceso de escritura al descriptor de archivo 3 del proceso sudo. Esto se presenta debido a una condici\u00f3n de carrera entre la determinaci\u00f3n de un uid y las llamadas al sistema setresuid y openat. El atacante puede escribir \"ALL ALL=(ALL) NOPASSWD:ALL\" en /proc/#####/fd/3 en un momento cuando Sudo solicita una contrase\u00f1a. NOTA: Esto se ha disputado debido a la forma en que funciona Linux /proc. Se ha argumentado que escribir en /proc/#####/fd/3 solo ser\u00eda viable si tuviera permiso para escribir en /etc/sudoers. Incluso con permiso de escritura en /proc/#####/fd/3, no le ayudar\u00eda a escribir en /etc/sudoers."
}
],
"id": "CVE-2019-18684",
"lastModified": "2024-11-21T04:33:31.627",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 6.9,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 3.4,
"impactScore": 10.0,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
],
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.0,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.0,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2019-11-04T16:15:11.437",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://gist.github.com/oxagast/51171aa161074188a11d96cbef884bbd"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Third Party Advisory"
],
"url": "https://gist.github.com/oxagast/51171aa161074188a11d96cbef884bbd"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-362"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…